<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app"></div>
  <!-- 1.引入依赖 -->
  <script src="../react/react.development.js"></script>
  <script src="../react/react-dom.development.js"></script>
  <script src="../react/babel.min.js"></script>
  <!-- 2.开始开发 -->
  <script type="text/babel">
    // 电影列表展示
    class App extends React.Component{
      constructor() {
        super()

        this.state = {
          counter: 0
        }
      }

      render() {
        return (
          <div>
            <h2>当前计数:{this.state.counter}</h2>
            <button onClick={this.increment.bind(this)}>+1</button>
            <button onClick={this.decrement.bind(this)}>-1</button>
          </div>
        )
      }

      increment() {
        this.setState({
          counter: this.state.counter + 1
        })
      }

      decrement() {
        this.setState({ 
          counter: this.state.counter - 1
        })
      }
    }
    ReactDOM.render(<App/>, document.getElementById('app'))
  </script>
</body>

</html>